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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./css/style.css">
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<body>
    <div class="box">
            <input type="text" id="ipt" class="ipt">
            <p>正则是：<span id="reg"></span></p>
            <p>结果是：<span id="rs"></span></p>
    </div>
    <script src="./js/script.js"></script>
</body>
</html>